Stormwater Management Manual

The Arapahoe County Stormwater Management Manual was adopted by the Board of County Commissioners on January 30, 2007. The Stormwater Management Manual details the County’s requirements for the planning, design, construction and operation of stormwater facilities within the unincorporated areas of the County.

Since its original adoption, revisions have been made to provide clear guidance, regulations and updates. A Revision and Update Summary of most of these changes is provided below.

For additional information, please contact the Public Works and Development Department at 720-874-6500.